If you have a Bosch Dishwasher Error Code E2, it means there is an issue with the temperature sensor (thermistor).
A Bosch dishwasher error code E2 can be caused by many things: a power outage, low or high voltage wiring, bad ground connection to the appliance’s electrical box, and more.
As long as your dishwasher has power going to it (you should check this first), then you will want to look for any problems with the temperature sensor. The best way to do that is by reading through our troubleshooting guide.
This temperature sensor is responsible for the heating element operation. In most cases, the element operates at maximum power it there is the E2 error code. The thermistor is located in the block with the heating element.
How To Fix Bosch Dishwasher Error Code E2
The main function of the temperature sensor (thermistor) is to regulate the heat of the Bosch dishwasher. The Bosch sensor E2 error code occurs when it does not work properly.
Bosch dishwashers have multiple sensors, and each one is responsible for different things. Bosch Dishwasher Error Code E2 means that your Bosch dishwasher has an issue with the thermal sensor (thermistor).
After checking that there are no broken wires, high or low voltage, or other power issues, you can focus on fixing the Bosch thermistor fault in order to fix your Bosch Dishwasher Error Code E2 problem.
Start by turning off the water supply into your Bosch dishwasher and disconnecting the electricity source, which goes to your appliance and then opens up the Bosch dishwasher. Remove the Bosch cover or Bosch kick plate and access the Bosch thermistor connector.
Now locate Bosch thermostat in the block of Bosch heating element. You can see the Bosch Phillips head screw right next to it, which helps you detach Bosch thermal sensor.
If this is Bosch Super Eco 50 model, the Bosch sensor E2 error code will appear more often because its built-in oxygen leak detector always checks the power source if the Bosch dishwasher is working correctly for safety purposes.
How to test Thermistor
Please follow the below steps on how to test a Bosch Thermistor:
- Step 1: Use a digital multimeter to check your Bosch Thermistor. If you haven’t got one, ask a Bosch professional to do it for you.
- Step 2: Disconnect the Bosch Thermistor from the dishwasher and measure its resistance at room temperature (77°F/25°C).
- Step 3: Put Bosch Thermistor in boiled water (212°F/100°C) and measure its resistance again.
If Bosch Thermistor is good, then its resistance should change between 20~60 KOHM. However, if Bosch Dishwasher Error Code E2 reappears after cleaning the contacts or replacing the Bosch Thermistor, then you may have to contact a professional to look into the issue.